| Popis: |
Summary With advancement of drill and hydraulic fracturing technologies, shale gas are blooming in recent years. The Middle East also pays high attention to unconventional plays. The Diyab source in western UAE deposited in an intra-shelf basin with mudstone, wackestone, and high argillaceous-carbonaceous matters in the low section. This set is widely developed with high TOC, thickness, maturity and is evaluated to be the main unconventional play of gas bearing. Based on data of wells, cores and seismic, a procedure of basin modelling was implemented to regionally evaluate the Diyab. Generally, good source of the Diyab performs TOC 2-4%, with maximum of 5.2%. Thickness of net play ranges around 100-150ft. This formation has high maturity of Ro 1-1.4. Hydrocarbon generation and expulsion intensity from basin modelling are 25bcf/km2，20bcf/km2 respectively. Focusing on the most favorable area, sweet spot was predicted to capture key parameters of TOC, brittleness, porosity, fracture and strain & stress. Based on evaluation from the factors, one well was drilled in 2019 and yielded gas in vertical borehole after hydraulic fracturing. The result is encouraging and indicates unconventional gas potential in the Diyab. |
